1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021 Beckhoff Automation GmbH & Co. KG 5 * Author: Corvin Köhne <c.koehne@beckhoff.com> 6 */ 7 8 #pragma once 9 10 #include <vmmapi.h> 11 12 #include "qemu_fwcfg.h" 13 14 enum e820_memory_type { 15 E820_TYPE_MEMORY = 1, 16 E820_TYPE_RESERVED = 2, 17 E820_TYPE_ACPI = 3, 18 E820_TYPE_NVS = 4 19 }; 20 21 enum e820_allocation_strategy { 22 /* allocate any address */ 23 E820_ALLOCATE_ANY, 24 /* allocate lowest address larger than address */ 25 E820_ALLOCATE_LOWEST, 26 /* allocate highest address lower than address */ 27 E820_ALLOCATE_HIGHEST, 28 /* allocate a specific address */ 29 E820_ALLOCATE_SPECIFIC 30 }; 31 32 struct e820_entry { 33 uint64_t base; 34 uint64_t length; 35 uint32_t type; 36 } __packed; 37 38 #define E820_ALIGNMENT_NONE 1 39 40 uint64_t e820_alloc(const uint64_t address, const uint64_t length, 41 const uint64_t alignment, const enum e820_memory_type type, 42 const enum e820_allocation_strategy strategy); 43 void e820_dump_table(void); 44 struct qemu_fwcfg_item *e820_get_fwcfg_item(void); 45 int e820_init(struct vmctx *const ctx); 46